Biocontrol strain 09B18 for preventing and controlling cereal cyst nematode of wheat, method for preparing biocontrol agent and application of biocontrol agent

Abstract

The invention discloses a biocontrol strain 09B18 for preventing and controlling the cereal cyst nematode of wheat. The biocontrol strain 09B18 for preventing and controlling the cereal cyst nematode of wheat is bacillus cereus, and has the preservation number of CGMCCNO:8632. The biocontrol strain is a special biocontrol agent for the cereal cyst nematode of wheat; the biocontrol strain is a biological agent, so that a series of problems caused by the use of chemical pesticides are completely solved, and the pollution-free production of wheat crops is facilitated; the use of the other chemical pesticides can be avoided or reduced, so that the expenditures of farmers can be reduced, and the quality of grains is favorably improved; the biocontrol strain 09B18 is verified by prevention and control tests to have good prevention and control effects on the cereal cyst nematode of wheat, and the cyst reduction rate in indoor and field tests reaches 75.9 percent and 43.47 percent respectively; in addition, the biocontrol strain also has a yield-increasing effect, so that the income of the farmers can be increased.

Description

technical field [0001] The invention belongs to the field of plant protection, and relates to a biocontrol bacterial strain 09B18 for preventing and treating wheat cereal cyst nematodes and an application thereof. Background technique [0002] Cereal Cyst Nematode (CCN) is a serious global plant nematode disease, and it is also a new wheat soil-borne disease that occurred in my country in recent years. The pathogen is wheat cereal cyst nematode ( Heterodera avenae group), belonging to the class Nematodes, Nematodes order, Heterodermaceae, Heteroderma genus, damages wheat, barley, oats, rye and other cereal crops and more than 40 kinds of pastures such as purple fescue, oxtail and fescue . Pathogenic nematodes mainly harm the roots of wheat, invade and multiply in the root system of wheat, and cause the root system to form bulbous root knots, thereby inhibiting the absorption of nutrients by the plant, causing yellowing of the aboveground leaves of wheat, dwarfing of the p...

AI Technical Summary

Problems solved by technology

However, in the vast wheat growing areas in my country, crop rotation with non-host crops is often difficult to implement on a large scale due to various reasons; some studies have found that among the wheat varieties widely promoted in my country's production, there are very few resistant varieties to wheat cyst nematodes. Most varieties are susceptible or highly susceptible varieties; although some progress has been made in the screening of chemical pesticides, the pesticides that can effectively control wheat cereal cyst nematodes are highly toxic and costly, which is largely restricted , biological control has received more and more attention due to its own advantages, but there are still few reports on the biological control of wheat cereal cyst nematodes. The development of high-efficiency, stable and large-scale production of biocontrol agents is the demand for sustainable agricultural development

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